Assessing the Feasibility of Linkage Disequilibrium Methods for Mapping Complex Traits: An Initial Screen for Bipolar Disorder Loci on Chromosome 18

Linkage disequilibrium (LD) analysis has been promoted as a method of mapping disease genes, particularly in isolated populations, but has not yet been used for genome-screening studies of complex disorders. We present results of a study to investigate the feasibility of LD methods for genome screen...

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Veröffentlicht in:American journal of human genetics 1999-06, Vol.64 (6), p.1670-1678
Hauptverfasser: Escamilla, Michael A., McInnes, L. Alison, Spesny, Mitzi, Reus, Victor I., Service, Susan K., Shimayoshi, Norito, Tyler, David J., Silva, Sandra, Molina, Julio, Gallegos, Alvaro, Meza, Luis, Cruz, Maria L, Batki, Steven, Vinogradov, Sophia, Neylan, Thomas, Nguyen, Jasmine B., Fournier, Eduardo, Araya, Carmen, Barondes, Samuel H., Leon, Pedro, Sandkuijl, Lodewijk A., Freimer, Nelson B.
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container_end_page 1678
container_issue 6
container_start_page 1670
container_title American journal of human genetics
container_volume 64
creator Escamilla, Michael A.
McInnes, L. Alison
Spesny, Mitzi
Reus, Victor I.
Service, Susan K.
Shimayoshi, Norito
Tyler, David J.
Silva, Sandra
Molina, Julio
Gallegos, Alvaro
Meza, Luis
Cruz, Maria L
Batki, Steven
Vinogradov, Sophia
Neylan, Thomas
Nguyen, Jasmine B.
Fournier, Eduardo
Araya, Carmen
Barondes, Samuel H.
Leon, Pedro
Sandkuijl, Lodewijk A.
Freimer, Nelson B.
description Linkage disequilibrium (LD) analysis has been promoted as a method of mapping disease genes, particularly in isolated populations, but has not yet been used for genome-screening studies of complex disorders. We present results of a study to investigate the feasibility of LD methods for genome screening using a sample of individuals affected with severe bipolar mood disorder (BP-I), from an isolated population of the Costa Rican central valley. Forty-eight patients with BP-I were genotyped for markers spaced at ∼6-cM intervals across chromosome 18. Chromosome 18 was chosen because a previous genome-screening linkage study of two Costa Rican families had suggested a BP-I locus on this chromosome. Results of the current study suggest that LD methods will be useful for mapping BP-I in a larger sample. The results also support previously reported possible localizations (obtained from a separate collection of patients) of BP-I–susceptibility genes at two distinct sites on this chromosome. Current limitations of LD screening for identifying loci for complex traits are discussed, and recommendations are made for future research with these methods.
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Chromosome 18 was chosen because a previous genome-screening linkage study of two Costa Rican families had suggested a BP-I locus on this chromosome. Results of the current study suggest that LD methods will be useful for mapping BP-I in a larger sample. The results also support previously reported possible localizations (obtained from a separate collection of patients) of BP-I–susceptibility genes at two distinct sites on this chromosome. 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source MEDLINE; Cell Press Free Archives; ScienceDirect Journals (5 years ago - present); EZB-FREE-00999 freely available EZB journals; PubMed Central
subjects Adult and adolescent clinical studies
Biological and medical sciences
Bipolar disorder
Bipolar Disorder - genetics
Bipolar disorders
Chromosome Mapping
Chromosomes, Human, Pair 18
Costa Rica
Genetics
Genotype
Humans
Likelihood Functions
Linkage Disequilibrium
Medical genetics
Medical sciences
Mental and behavioral disorders
Mood disorders
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Quantitative Trait, Heritable
title Assessing the Feasibility of Linkage Disequilibrium Methods for Mapping Complex Traits: An Initial Screen for Bipolar Disorder Loci on Chromosome 18
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